body{
    background: linear-gradient(125deg, red, green,blue);
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

#canvas1{
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left:0;
}
#collisionCanvas{
   opacity: 0;
}